/// <summary>
/// ZipDecryptor
/// </summary>
/// <param name="a"></param>
/// <returns></returns>
private static byte[] A(byte[] a)
{
var A = new CB <CA>(new CA());
var b = CA.IA;
CA.IA = C;
var c = A.I(a, A.II(B));
CA.IA = b;
return(c);
}